There may be no single cause of bipolar disorder (aka manic depression). Instead, research indicates the causes of bipolar disorder are probably a combination of biochemical, genetic and environmental factors that may trigger and perpetuate the chemical imbalances in the brain.
Net worth: $829 million. Telecommunications mogul Strive Masiyiwa is widely regarded as the richest man in Zimbabwe and is one of the richest men in Africa with a net worth of more than US$800 million.
Top 10 Richest Black People in the World 2016 net worth and income. They say that black is beautiful, but these people can also add the word wealthy tothat.There are more black billionaires in Africa than anywhere else on the planet, in fact the richest man on our inaugural list is Alhaji Aliko Dangote and etimated net worth $16.1 billion.